In the production process of palm cooking oil are produced the various types of waste, one of whi... more In the production process of palm cooking oil are produced the various types of waste, one of which is liquid waste. The liquid waste is estimated to still contain fatty acids which are relatively potential as raw materials for biodiesel synthesis. This study aims to determine the optimum condition of the trans-esterification stage with NaOH catalyst on the utilization of liquid waste from palm cooking oil industry as a raw material for biodiesel synthesis. The optimum conditions for the trans-esterification stage were studied based on the parameters of the mole ratio of oil to methanol (1: 5, 1: 7, 1: 9, and 1: 1) and the NaOH catalyst content (0.3, 0.5, and 0.7%-w/w). The biodiesel synthesis in this study was carried out in 5 stages, namely: raw material characterization, esterification stage with H 2 SO 4 catalyst, trans-esterification stage with NaOH catalyst, biodiesel purification, and biodiesel characterization. The results showed that the optimum condition at the trans-esterification stage were achieved in the reaction with oil to methanol mole ratio of 1: 5 and 0.5% NaOH catalyst content. In this condition biodiesel was produced with yield of 87.62% and it have the characteristics of density, viscosity, acid number, flash point, and energy content were 863.5 kg/m 3 , 4.1 mm 2 /s, 1.61 mg KOH/g of biodiesel, 140ºC, and 38.22 MJ/kg, respectively.
In the production process of palm cooking oil are produced the various types of waste, one of whi... more In the production process of palm cooking oil are produced the various types of waste, one of which is liquid waste. The liquid waste is estimated to still contain fatty acids which are relatively potential as raw materials for biodiesel synthesis. This study aims to determine the optimum condition of the trans-esterification stage with NaOH catalyst on the utilization of liquid waste from palm cooking oil industry as a raw material for biodiesel synthesis. The optimum conditions for the trans-esterification stage were studied based on the parameters of the mole ratio of oil to methanol (1: 5, 1: 7, 1: 9, and 1: 1) and the NaOH catalyst content (0.3, 0.5, and 0.7%-w/w). The biodiesel synthesis in this study was carried out in 5 stages, namely: raw material characterization, esterification stage with H 2 SO 4 catalyst, trans-esterification stage with NaOH catalyst, biodiesel purification, and biodiesel characterization. The results showed that the optimum condition at the trans-esterification stage were achieved in the reaction with oil to methanol mole ratio of 1: 5 and 0.5% NaOH catalyst content. In this condition biodiesel was produced with yield of 87.62% and it have the characteristics of density, viscosity, acid number, flash point, and energy content were 863.5 kg/m 3 , 4.1 mm 2 /s, 1.61 mg KOH/g of biodiesel, 140ºC, and 38.22 MJ/kg, respectively.
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Papers by Surya Pramana